Effective against fipronil-resistant strains of fleasKills pre-existing and new infestations of paralysis ticks (Ixodes holocyclus) for 3 months. Provides effective treatment and prevention of fleas on cats for up to 3 months following application. Fleas are killed in up to 12 hours after treatment of after reinfestation during the 3-month treatment period. The flea life cycle can be broken by the rapid onset of action and the long-lasting efficacy against adult fleas on the cat. Newly emerged adult fleas on a cat are killed before viable eggs are produced. Effectively controls environmental flea population in areas to which the cat has access.